Excavator.



Patented Mar. 13, 1917.

4 SHEETS-SHEET l.

C. S. BUTTERFIELD.

EXCAVATOR.

APPLICATION FILED IuLY 28.1916.

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c. s. BUTTERHELD.

EXCAVATOR.

APPLICATlON FILED JULY 28| 1916. 1,2l 9,371.

Patented Mar. 13, 1917.

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C. S. BUTTERFIELD.

EXCAVATOR.

APPLICATION FILED IuLY 2'8. I9Ie.

Patented Mar. 13, 1917.

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C. S. BUTTERFIELD.

EXCAVATOR.

APPLICATION FILED JULY 28.1916. 1,21 9,371. Patented Mar. 13, 1917.

4 SHEETS-SHEET 4.

10 E lt/7 @NET CHARLES S. BUTTERFIELD, OF MISSION, TEXAS.

EXCAVATOR.

Speccaton of Letters Patent.

Patented Mar. 13, 1917,

Application filed July 28, 1916. Serial No. 111,896.

To all whom it may conccm:

Be it known that l, CHARLES S. BUTTER- innm), a citizen of the UnitedStates,` residing at Mission, in the county of Hidalgo and State ofTexas, have invented new and useful Improvements in Excavators, of whichthe following is a specification.

The invention relates to an excavator, and more particularly to theclass of canal excavating machines. 'f

The primary obj ect of the invention is the provision of a machine ofthis character wherein the buckets are automatically moved after thecharging thereof for the discharge of their load at opposite sides ofsaid canal or upon the banks thereof, the hanging and mode of operationof the buckets being novel to assure the excavation of the work withdespatch and the positive charging of said buckets and the discharge oftheir contents.

Another obj ect of the invention is the provision of a machine of thischaracter wherein a canal can be dredged, the working parts of theexcavator being supported upon pontoons which float from the body ofWater within the canal or channel and the booms and also the gunwale canbe properly adjusted without excessive labor or inconvenience to theuser of the machine.

A further object of the invention is the provision of a machine of thischaracter wherein the capacity thereof can be varied and said capacitywill be under the control of the strength of the boom, boom beams andpower of the engine to pull drag lines.

A still further object of the invention is the provision of a machine ofthis character which is simple in construction, thoroughly reliable andeflicient in its operation, strong, durable and inexpensive inmanufacture.

Other objects will be in part obvious and in part hereinafter set forth.

The invention accordingly consists in the features of construction,combination of elements and arrangement of parts which will beexemplified in the construction hereinafter described, and the scope ofthe application of which will bc indicated in the appended claims.

In the accompanying drawings:

Figure 1 is an elevation of an excavating machine constructed inaccordance with the invention Fig. 2 is a side elevation.,

Fig. 3 is a fragmentary top plan view;

Fig. 4E is a view similar to Fig. 3, showing the dolly support anddollies therein, with the excavating mechanism removed;

Fig. 5 is a sectional view on the liuc of Fig. a, looking in thedirection of the arrow;

Fig. G is a fragmentary vertical transverse sectional view through oneof the dolly supports and dolly.

Similar reference characters indicate corresponding parts throughout theseveral views of the drawings.

Referring to the drawings in detail, A designates a pair of pontoonswhich are arranged side by side and are adapted to float and rise in abody of water within a canal, channel or the like, and between thesepontoons is arranged a thrust or center board B which is of any ordinarywell known construction, it being understood, of course, that the lengthand width of each pontoon can be varied in accordance with the size ofthel canal or channel and also correspondlngly to the capacity of themachine for the proper and successful execution of the work in thedredging of a canal or channel. The pontoons A are connected togetherthrough the medium of end cross timbers C which are fastened thereto inany suitable manner.

Mounted upon the pontoons A at the top thereof are dolly supports l0 inwhich are arranged rollers ll constituting the dollies, and upon theserollers are adapted to move the gunwale frame 12 which carries at oneend a boom beam 18 supporting a derrick hereinafter fully described.

Arranged at the desired point upon one or both of the pontoons A is astationary engine lll of any approved type which operates a pair ofdrums 15 and 16, the connection between the same and the said engine 14being of vany well known construction to permit the reversing of thedrums 15 and 16 and the stopping and starting thereof when the occasionrequires.

Adjustably connected to the boom beam 13 near the ends thereof are thebooms 17 which extend in upwardly and forwardly divergent relation toeach other to opposite sides of the machine, while supported upon thegunwale frame 12 is the derrick including an inverted substantiallyV-shaped frame 18 having the braces 19, and to the head 20 of this frame18 are connected the blocks and falls or tackle 21. The fall line 22 ofeach is adapted to be fastened to a clevis 23 carried by the frame 18,and connected with these blocks and falls 21 are the wire'stake cables24 which are also connected to the outer ends of the booms 17, as shown.

Mounted upon the outer ends of the booms 17 are drag line pulleys 25over which are trained pull drag lines 26, preferably wire, the samebeing also trained over sheaves 27 located centrallyk on the boom beam18 for the winding thereof on and from the drum 15, to which said lines26 are connected, the saine being Valso connected to drag buckets 28preferably of the shape shown and are adapted to be charged from the bedof the canal or channel for the delivery of their contents to the bankor ground at opposite sides of the same in a manner presently described.

Upon the head 20 of the frame 18 are mounted drag line pulleys 29 overwhich are trained the back drag lines 30, preferA ably of wire, andconnected to the buckets 28 and also to the drum 16 for the windingthereof on and the unwinding of the same .therefrom when the machine isin operation.

Connected to the head 20 of the frame 18 which constitutes the derrickare wire cable guides 31 which are connected to a cross sill 32 at therear end of the gunwale frame 13 and have therein turn buckles 33 forthe tightening or slackening of each guide.

The, gunwale frame 12 is moved backwardly and forwardly upon the roller11 throughthemedium of a connection with aV winch Si supported upon oneof the pontoonsIA and the same is operated in any suitable manner,although it may be operated v lfromtheengine 111 or otherwise.

It is to be understood, of course, that theY Y pontoons A can beanchored within the canal or channel in any ordinary well known manner.

In the operation of the machine the buck-V ets 28 are broughtto thecenter of the pon-V toonsby the back drag line 8O after the dumping oflsaid lbuckets andthen the same are lowered to be iilled by the pull drag1 ing wound upon and unwound from the drums 15 and 16.011 the operationof the engine 14 which is controlled by an engineer. It will of coursebeunderstood that the back drag line 30 can be spliced togetherrearwardly of the derrick and in this event a single line from the pointof the splice can be connected to for the winding thereof on and fromthe drum 16, and in this event either or both buckets 28 maybe operatedsince the splice of the back drag lines 30 may be separated for thepurpose of using either right or left back drag lines. Each bucket 28carries a stirrup 35 to which each Iback drag line 30 is connected, andthis stirrup has therein a pin 36 which, on the adjustment thereof, willregulate the tilt of the bucket to load fast or slow, as usual.

The buckets 28 are made from material sul'liciently vheavy to submergethemselves and also load themselves upon the proper movement of the draglines 26 and 30, and are constructed to load and carry the number ofcubic feet of excavated material desired, while the booms 17 can bereadily adjusted and also the derrick, as the occasion may require.

From the foregoing description, taken inv connection with theaccompanying drawings, the construction and'operation of the hereindescribed-excavator will be readily apparent, and, therefore, a moreextended explanation has been omitted.

Having thus described my invention, li claim: Y

1. An excavating machine comprising a pair pontoons, a thrust boardarranged between the saine, a gunwale frame mov-` ably supported uponthe pontoons, a boom beam fixed to one end of the` gunwale frame, a pairof booms adjustably connectedto the beam, a fderrick upon the gunwaleframe, drums rotatably supported-upon the Apontoons, meansconnected withthe derrick and the booms for suspending` the latter, drag buckets, andpull and back drag lines con nected with the buckets and with the drumsrfor operation by the Llatter to move the bucle ets towardand away fromeach other and also for raising andI loweringthe saine.

2. An excavating machine comprising a pair of pontoons, a thrust boardarranged between the saine9 a gunwale frame movably supported upon thepontoons, a lboom beain ixedfto one'endof the gunwale frame, a pair ofbooms adjustably connected to the beam,y a derrick uponrthen gunwaleframe, drums rotatably supportedupon the: pontoons, means connected withthe "derrick and the booms for suspending-the latter, drag with vthebucketsand with the drums for operation by the latterto move kthebuckets Y i toward and away fromeach other Vand also. for raising andlowering. the same, dolly supports on the pontoons, and dollies arrangedinl the supports and. havingv theV gunwale frame thereon. Y Y

3. An excavating ymachine',icomprising. a pair of pontoons, a thrustboard `arranged between the same, a gunwale frame movably supported uponthe pontoons, aiboom beam fixed to one end of the gunwale frame, a pairof booms adjustably connected to the beam, a derrick upon the gunwaleframe, drums rotatably supported upon the pontoons, means connected withthe derrick and the booms for suspending the latter, drag buckets, pulland back drag lines connected with the buckets and the drtuns foroperation by the latter to move the buckets to ward and away from eachother and also for raising and lowering the same, dolly supports on thepontoons, dollies arranged iu the supports and having the gunwale framethereon, and guide pulleys on the boom beam, booms and derrick for thedrag lines.

4. An excavating machine comprising a pair of pontoons, a thrust boardarranged between the same, a gunwale frame movably supported upon thepontoons, a boom beam fixed to one end of the gunwale frame, a pair ofbooms adjustably connected to the beam, a derrick upon the gunwaleframe, drums rotatably supported upon the pontoons, means connected withthe derrick and the booms for suspending the latter, drag buckets, pulland back drag lines connected with the buckets and with the drums foroperation by the latter to move the buckets toward and away from eachother and also for raising and lowering the same, dolly supports on thepontoons, dollies arranged in the supports and having the gunwale framethereon, guide pulleys on the boom beam, booms and derrick for the draglines, and means for adjusting the gunwale frame.

5. An excavating machine comprising a4 pair of pontoons, a thrust boardarranged between the same, a gunwale frame movably supported upon thepontoons, a boom beam fixed to one end of the gunwale frame, a pair ofbooms adj ustably connected to the beam, a derriek upon the gunwaleframe, drums rotatably supported upon the pontoons, means connected withthe dei-rick and the lbooms for suspending the latter, drag buckets,pull and back drag lines connected with the buckets and with the drumsfor operation by the latter to move the buckets toward and away fromeac-h other and also for raising and lowering the same, dolly supportson the pontoons, dollies arranged in the supports and having the gunwaleframe thereon, guide pulleys on the boom beam, booms and derrick for thedrag lines, means for adjusting the gunwale iframe, and means foroperating the drums.

In testimony whereof I aiiix my signature @HARLEY S. BUTTERFIELD.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

